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Show 171 MR. J. COUCH ON APLYSIA MELANOPUS. [Mar. 24, greatly bruised and mutilated, and was thus deprived of the lively colours which the first possessed. As I have never seen the species before, I have judged these animals worthy of particular notice ; and I think that the more perfect example is deserving of a minute Fig. 1. Aplysia melanopus, nat. size. a, mouth; b, c, tentacles; d, reproductive organ (this and the eye scarcely visible in the woodcut); e, foot, of a dark colour. Fig. 2. Shell of Aplysia melanopus, showing nucleus to be nearly central. description, as also of a place in the British Museum. Measured in a straight line, its length is 4g inches ; it is very plump, especially posteriorly, where, in girth, it measures 6 inches. That part which forms the head projects ; and in front of it is the mouth (a), which |